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40 lines
1.0 KiB
PHP
40 lines
1.0 KiB
PHP
<?php
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/**
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* @file
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* @license https://opensource.org/licenses/Apache-2.0 Apache-2.0
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*/
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namespace Wikimedia\CSS\Grammar;
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use Wikimedia\CSS\Objects\ComponentValueList;
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/**
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* Wrap another matcher in a callback to verify the matches
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*/
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class CheckedMatcher extends Matcher {
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/** @var Matcher */
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private $matcher;
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/** @var callable */
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protected $check;
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/**
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* @param Matcher $matcher Base matcher
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* @param callable $check Function to check the match is really valid.
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* Prototype is bool func( ComponentValueList $values, GrammarMatch $match, array $options )
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*/
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public function __construct( Matcher $matcher, callable $check ) {
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$this->matcher = $matcher;
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$this->check = $check;
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}
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/** @inheritDoc */
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protected function generateMatches( ComponentValueList $values, $start, array $options ) {
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foreach ( $this->matcher->generateMatches( $values, $start, $options ) as $match ) {
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if ( call_user_func( $this->check, $values, $match, $options ) ) {
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yield $this->makeMatch( $values, $start, $match->getNext(), $match );
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}
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}
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}
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}
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